1. Family: Araceae Juss.
    1. Genus: Amorphophallus Blume ex Decne.
      1. Amorphophallus stuhlmannii (Engl.) Engl. & Gehrm.

        This species is accepted, and its native range is DR Congo, E. Tropical Africa.

    [CATE]

    CATE Araceae, 17 Dec 2011. araceae.e-monocot.org

    General Description
    Tuber [com]pressed to globose, 20-30 cm in diameter, roots emerge from the upper side. LEAF 0.6-2.5(-3.5) m high, partially expanded during flowering. Petiole 0.5-2.4(-3 fide Engler 1908) m long; about 2-4 cm in diameter at the base; purple to pink, with greenish spots, or background pale green with elongate, dark green or purple spots (subsp. congoensis). Blade 0.5-2(-3) (fide Engler 1905) m in diameter, lower part of the main and end segments of the leaf up to the first branching 10 to 40 cm long; rachis 1-2 cm wide, broad elliptically ('oval') to asymmetrically winged, usually only from the first branching of the main- and endleaflets. Terminal leaflets connected with numerous veins, 1 cm distant from each, [veins] slightly raised and reddish brown; under side pale green, upper side dark green; broadly elliptic ('oval'), 9-22 x 3-8 cm, ending in a distinctly delimited, 1.5-2.5 cm long tip; margin smooth to slightly crinkly. Cataphylls 3, broad, broadly elliptic ('oval') to triangular, the inner one up to 30 cm long, pink to white, with green small spots and dots. INFLORESCENCE long stipitate, flowering before total leaf expansion, up to 2.5 m high. Peduncle (20-)30-150 cm long, 1-3 cm in diameter. Stathe 25-60 cm long; arranged, without a distinct constriction, into an open limb and a tube [which is] rolled-up into a tilted pipe; rarely with a stronger constriction. Tube ± cylindrical to ovoid ('oval'), 5.5-11 x 5.5-7.5 cm; outside olive to green with whitish dots; inside dark purple, inside basally with hair-like emergences, these 1-4 mm long, emergences reaching up the tube for 3-6 cm, purple. Open limb erect to slightly nodding, 18-40 x 12-25 cm, broadly elliptic ('oval') to triangular, often acutely attenuating; outside olive, green to purple with whitish to greenish dots and spots, then becoming purple; margin undulate to folded, sometimes twisted. Spadix sessile or stipitate for 5 mm at the most; 30-90 cm long, longer than the spathe, emerging from the axis at an angle, erect. Pistillate zone cylindrical, 2.5-8 x 1.5-3 cm, flowers often lossely dispersed, not congested. Staminate zone obconical, 3-4.5 x 1-4 cm, flowers congested. Appendix stretched out conical to club-shaped, 30-83 cm long, 1-5 cm in diameter at the base, 0.4-3 cm in diameter at the tip; surface smooth to velvety and basally with longitudinal furrows and studded with microscopically small emergences (velvety), greenish or light purple, basally constricted. Sterile zone between staminate and pistillate zone absent or 2-4 cm broad (subsp. congoensis); rato of pistillate to staminate zone 0.7 : 1; staminodes absent or [present] in the shape of sterile anthers, these wandering up the appendix for 2-3 cm (subsp. congoensis). Pistillate flowers 6-7 mm long; ovary 3-5 x 2-3 mm, globose to ovoid ('oval'), bi- to tri(-quadri)locular, green; style 1-2 mm long, purple to brownish; stigma rarely subsessile, usually with a distinct style, 1-4 x 2-4 mm, purple to orange, deeply bi- to tri-lobed, stigma lobes 1-3.5 x 1-1.2 mm long, acute conical to conical, arched in the middle ('bull horns' ("Stirhörner')). Staminate flowers with 2-4 stamens; anthers 2 x 1 mm, free, light yellow, pink to orange; filaments short or up to 1.5 mm long, free or 2-4 fused basally; thecae sometimes bean shaped; pores apical, 2 or 1 circular to broadly elliptic ('oval') or slit shaped pore(s) visible per theca; connective darker and channelled. Pollen inaperturate, 56.6 x 52.9 µm, circular. Exine verrucate. INFRUCTESCENCE not known.
    Diagnostic
    Basal inner side of the spathe with hair-like emergences; 2-3 deep “bull horn”-like to acute conical stigma lobes ; Style present.
    [FTEA]

    Araceae, S.J. Mayo. Flora of Tropical East Africa. 1985

    Habit
    Plant robust.
    Tubers
    Tuber depressed-globose, up to 30 cm. in diameter.
    Cataphylls
    Cataphylls oblong-lanceolate, 30–49 cm. long, 5–11 cm. broad, pinkish white with green blotching.
    Leaves
    Petiole 1–2.5 m. long, ± 4 cm. in diameter, purple, liver-coloured or pinkish with grey-green to green spots; ultimate leaf-lobes obovate, acuminate, 7–20 cm. long, 3–7 cm. broad, bright to dark glossy green.
    Inflorescences
    Inflorescence appearing just before leaf, up to 2 m. tall; peduncle 30–100 cm. long, 1–2 cm. in diameter, colour similar to petiole.
    Spathe
    Spathe 29–50 cm. long; tube obliquely ovoid to obovoid, gradually constricted towards apex, 8–15 cm. long, 5.5–7.5 cm. in diameter, outer surface dull olive green with whitish mottling, inner surface densely covered towards base with filamentous to subulate projections up to 4 mm. long, dull dark purple; limb ovate-triangular, acuminate, margins undulate, 19–34 cm. long, 12–25 cm. broad, suberect with reflexed apex, dark liverish purple on inner surface, becoming paler at base.
    Spadix
    Spadix 38–92 cm. long, longer than spathe; sterile appendix elongate-conic, slightly narrowed towards base, 30–83 cm. long, 1.4–5 cm. in diameter near base, 0.4–1.1 cm. in diameter near apex, ± smooth or shallowly ridged longitudinally near base, dull to glaucous, greyish to liverish purple, paler than spathe-limb; staminate part ± obconic, narrowed basally, 3–4.5 cm. long, 1.4–4 cm. in diameter; pistillate part cylindric, 2.5–5 cm. long, 1.5–3 cm. in diameter, usually contiguous with staminate part, pistils usually ± distant from one another, sometimes congested.
    Stamens
    Stamens free, pink to orange, ± 3.5 mm. long; filaments 1.5 mm. long; anthers 2 mm. broad.
    Pistil
    Pistil ± 6–6.5 mm. long; ovary 4–5 mm. in diameter, narrowed apically (2–)3(–4)-locular; ovules solitary in each locule; placentation basal; stigma 3 mm. long, 4–4.5 mm. in diameter, deeply (2–)3(–4)-lobed, lobes broadly conic and acute, bright orange.
    Fruits
    Fruit unknown.
    Habitat
    Evergreen forest, often on limestone; 0–1400 m.
    Distribution
    not known elsewhere T3 T6

    Distribution

    Native to:

    Kenya, Tanzania, Zaïre

    Amorphophallus stuhlmannii (Engl.) Engl. & Gehrm. appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    29047.071
    Faulkner, H. [1826], Tanzania 16863.000
    Polhill, R. [4623], Tanzania 29047.483
    Polhill, R. [709] 29047.786
    Polhill, R. [4623], Tanzania 47610.000
    Polhill [4623], Tanzania 47718.000

    First published in H.G.A.Engler (ed.), Pflanzenr., IV, 23C: 81 (1911)

    Accepted by

    • Ittenbach, S. (2003). Revision der afrikanischen Arten de Gattung Amorphophallus (Araceae) Englera 25: 1-263.
    • Govaerts, R. & Frodin, D.G. (2002). World Checklist and Bibliography of Araceae (and Acoraceae): 1-560. The Board of Trustees of the Royal Botanic Gardens, Kew.
    • Govaerts, R. (1995). World Checklist of Seed Plants 1(1, 2): 1-483, 1-529. MIM, Deurne.

    Literature

    CATE Araceae
    • Ittenbach, S. 2003. Revision der afrikanischen Arten der Gattung Amorphophallus (Araceae). Englera. 25: 5-263
    Kew Backbone Distributions
    • Ittenbach, S. (2003). Revision der afrikanischen Arten de Gattung Amorphophallus (Araceae) Englera 25: 1-263.
    Flora of Tropical East Africa
    • Peter in Nachr. Ges. Wiss. Göttingen, Math.-Phys. Kl. 1929 (3): 193 (1930).
    • Engl. & Gehrm. in A. Engler, Das Pflanzenreich 48 (IV. 23C): 81, fig. 28 (1911).

    Sources

    CATE Araceae
    Haigh, A., Clark, B., Reynolds, L., Mayo, S.J., Croat, T.B., Lay, L., Boyce, P.C., Mora, M., Bogner, J., Sellaro, M., Wong, S.Y., Kostelac, C., Grayum, M.H., Keating, R.C., Ruckert, G., Naylor, M.F. and Hay, A., CATE Araceae, 17 Dec 2011.
    http://creativecommons.org/licenses/by-nc-sa/3.0

    Flora of Tropical East Africa
    Flora of Tropical East Africa
    http://creativecommons.org/licenses/by-nc-sa/3.0

    Herbarium Catalogue Specimens
    'The Herbarium Catalogue, Royal Botanic Gardens, Kew. Published on the Internet http://www.kew.org/herbcat [accessed on Day Month Year]'. Please enter the date on which you consulted the system.

    Kew Backbone Distributions
    The International Plant Names Index and World Checklist of Selected Plant Families 2019. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
    © Copyright 2017 World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0

    Kew Names and Taxonomic Backbone
    The International Plant Names Index and World Checklist of Selected Plant Families 2019. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
    © Copyright 2017 International Plant Names Index and World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0